/**
 * Migration: 009 - Quality Assurance Schema
 * Description: Create quality measurement tables for quality assurance system
 * Version: 9.0
 * Date: 2025-01-XX
 */
import type Database from 'better-sqlite3';
import type { Migration } from '../types.js';
/**
 * Quality Assurance Schema Migration
 *
 * This migration:
 * 1. Creates quality_measurement_history table for tracking quality measurement history
 * 2. Creates quality_metrics table for storing latest quality metric values
 * 3. Creates quality_thresholds table for managing quality thresholds
 * 4. Creates indexes for efficient queries
 */
export declare class QualityAssuranceSchemaMigration implements Migration {
    version: string;
    name: string;
    description: string;
    /**
     * Load SQL file content
     */
    private loadSQLFile;
    /**
     * Execute SQL script
     * Removes transaction commands (BEGIN TRANSACTION, COMMIT) as MigrationRunner manages transactions
     */
    private executeSQL;
    /**
     * Check if table exists
     */
    private tableExists;
    /**
     * Check if index exists
     */
    private indexExists;
    /**
     * Check if column exists in table
     */
    private columnExists;
    /**
     * Validate before migration
     */
    validateBefore(db: Database.Database): Promise<void>;
    /**
     * Execute migration (Up)
     */
    up(db: Database.Database): Promise<void>;
    /**
     * Rollback migration (Down)
     */
    down(db: Database.Database): Promise<void>;
    /**
     * Validate after migration
     */
    validateAfter(db: Database.Database): Promise<void>;
}
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